Turning device for motor vehicles



May 27, 1930. J. A. GRANSTEDT TURNING DEVICE FOR MOTOR VEHICLES Filed June 20. 1928 [liven/or Jofian H'nsbe/m Grams/ea Patented May 27, 1930 UNITED STAT JOH AN ANSHELM GRANSTEDT, 0F SJALEVAD, SWEDEN, ASSIGNOR 0F ONE-HALF TO GUNNAR PER OLOF FOGFLQVIST, OF SUNDSVALL, SWEDEN TURNING DEVICE FOR MOTOR VEHICLES Application filed .Tune 20, 1928, Serial No. 286,990, and in Sweden June 27, 1927.

The present invention relates to a device by means of which a motor vehicle, for instance a motor car, may be turned in a simpleand practical way in a narrow thoroughfare or other place where it is difficult to turn round in the ordinary manner.

The turning device consists of one or more auxiliary wheels which are capable of being I against a wheel or disk mounted on the en gine shaft, or on a shaft driven by the engine shaft, such as the Cardan shaft, by means of which wheeler disk the auxiliary wheel or wheels may be put in rotation. By this arrangement it is possible to drive the auxiliary wheel or wheels, when lowered against the ground, from the engine of the vehicle, and thus to efiect the turning of the vehicle b means of power from the engine.

An em odiment of the invention is illustrated in the accompanying drawing by way of example. Fig. 1 shows diagrammatically the frame-work of a motor car according to the invention, in side view and partly in section, and Fig. 2 shows the frame-work viewed from above, while Fig. 8 shows a section'on the line IIIIH in Fig. 1.

As illustrated in the drawing, an auxiliary wheel l is rotatably mounted in a bearing or yoke2, which in its turn is rotatably mounted on a shaft 4 secured to the front portion of the frame 3. A small wheel or disk 6 having a concave running surface, is

mounted on the engine or Cardan shaft 5 and rotates with said shaft.

When the motor car is to be turned, the yoke 2 with the auxiliary wheel 1 is swung .down, for instance by means of a lever 7 having an arm 8 connected by a link 9 to an arm 10 secured to said yoke until the lower portion of said auxiliary wheel 1 comes to rest serve as a lifting jack.

It will be understood thatthe device may also be constructed in such manner that the against the ground, and its upper portion engages the wheel 6. By slightly reversing the motor car, the auxiliarywheel 1 will occupy the position shown in Fig. 1 in dotted and dashed lines. so dimensioned that in this position the front endof the car and the front wheels will be raised slightly from the ground. Since the wheel 6 rotates with the shaft 5, the wheel 1 will also rotate and the motor car will be turned around its rear end. If the motor car he again run ahead, the front wheels will be lowered, and the wheels 1 and 6 move out of engagement, after which the yoke 2 and the auxiliary Wheel 1 may be swung up and secured in suitable manner.

In case of a puncture, or otherwise when it is desired to make repairs on the front wheels, the deviceabove described may also rear end of the motor car will be raisedinstead of the front end, so that the motor car will be turned around its front end.

Also in the other respects the invention is not limited to the embodiment illustrated, which has only been described as an example of the. invention.

I claim I V V In a turning device for motor vehicles of the character described, the combination of a motor car frame, a shaft located in the longitudinal directionof said. car frame and adapted to be driven by the motor car en gine, a. wheel mounted on said shaft, and an auxiliary supporting wheel movably mounted in the motor car frame in such man nor that it may be moved to a position with its plane substantially perpendicular to the longitudinal direction of the motor car frame and withits upper portion bearing against The wheels 1 and 6 are and'supporting said first-named wheel and 7 its lower portion bearing against the ground thereby raising one end of the motor car frame. J OHAN: ANSHELM GRANSTEDT. 

